CN1048397C - Hydrogel Slow-releasing agent - Google Patents

Abstract

The present invention provides a hydrogel sustained-release preparation, which is at least composed of (1) more than one drug, (2) an additive added to make water soak into the interior of the preparation, and (3) a polymer substance forming a hydrogel Composition, the preparation has the ability to almost completely gel during the retention process in the upper part of the digestive tract (stomach and small intestine), and at the same time has the ability to release the drug in the colon in the lower part of the digestive tract. The preparation of the present invention can also dissolve and absorb the drug well in the colon, so as to achieve a stable slow-release effect.

Description

Hydrogel slow-releasing agent

The present invention relates to make medicine through the long-time slow releasing agent that slowly discharges, it is relevant not only on digestive tract top more specifically to say so, and also can disengage the hydrogel slow-releasing agent of medicine well at the colon place of digestive tract bottom.

So far, be purpose with the medicament slow release, various aqueogels have been proposed.As their example, known for example have that the spy opens on the clear 62-120315 communique, be pressed into have medicine and hydrogel generate can water soluble polymer and enteric solubility sugar-coat base; The spy opens on the clear 63-215620 communique, the nuclear that is formed by medicine and water-soluble high-molecular substance and be the aqueogel that the skin of base forms with the water-soluble high-molecular substance; And on the special public clear 40-2053 communique, contain medicine and oxirane high polymer, on demand and then contain the durative action preparation etc. of hydroaropic substance.

Yet these medicaments are purpose to continue to disengage medicine between demurrage on digestive tract tops such as stomach, small intestinals all, and are not purpose to disengage medicine in the few digestive tract bottom of moisture such as colon.Promptly for the slow releasing agent that disengages, absorbs the drug on the descending limit of digestive tract inner edge, the absorbability of digestive tract top medicine, disengaging property to biology availability produce considerable influence, and in colon, the influence of the refuse of and metabolism discharge few etc. because of water quantities, it is believed that the drug release difficulty in the past, and do not make research (Japanese medicament association the 6th annual meeting lecture summary collection (nineteen ninety), 30 pages fully about disengaging property of medicine; Pharm.Tech, Japan 8 (1): 41,1992).

And the biological half life of medicine itself also becomes the in question key factor of slow releasing agent, and for short medicine of half-life itself, fully slow releaseization is considered to (the monthly magazine medicine thing 25 (11): 29,1983) of difficulty.

Present inventors find aspect the slow release research of medicine, medicine is in digestive tract top delay processes such as stomach, small intestinal, and moisture is absorbed into preparation inside, almost completely divides a word with a hyphen at the end of a line to the digestive tract bottom with gel state, so the colon few at moisture also can disengage medicine, thereby finished the present invention.

Be that the present invention is a kind of hydrogel slow-releasing agent, it is by (1) at least a above medicine, (2) make water immerse the additive of preparation inside, (3) polymer substance of formation hydrogel forms, have in digestive tract top delay process the almost completely ability of gelation of preparation, have the ability that in colon, discharges medicine simultaneously.

By preparation that the present invention did almost completely the state of gelation be the about 70% of preparation, it is about that satisfied is is gelation state 80% or more.

Slow releasing agent of the present invention also can absorb at the colon position and be used, and the soak time of medicine can be prolonged significantly, and reach stable medicine blood concentration.Be that preparation of the present invention absorbs moisture when stopping on digestive tract top, almost completely gelation, the dosage surface limit is moved to the digestive tract bottom by the etch limit, and type discharge goes out medicine owing to further be subjected to etch, even if thereby also can reach good in the few colon of moisture and drug absorption that continue.

Below slow releasing agent of the present invention is described in more detail.

As more than one medicines that are applicable to preparation of the present invention,, then without particular limitation as if being purpose with the slow release.

As representational medicine, can enumerate: indometacin, diclofenac, diclofenac sodium, can treat solid, ibuprofen, Phenylbutazone, Offitril, DA-398, aspirin, ethoxybenzamide, acetaminophen, aminopyrin, Phenacetin, bromine Ding Dong Liang if antiinflammatory such as alkali, morphine, etomidoline, pentazocine, Fenoprofen calcium salt, analgesic, spasmolytic and analgesia etc.; Antitubercular agent such as isoniazid, ebutol; Circulatory system drugs such as isosorbide dinitrate, nitroglycerin, nifedipine, hydrochloric acid バ Le ニ ジ ピ Application, Licardipine Hydrochloride, persantin, Amrinone, Indenolol Hydrochloride, hydralazine hydrochloride, methyldopa, furan sieve amide, spironolactone, nitric acid guanethidine, reserpine, hydrochloric acid ァ モ ス ラ ロ-Le; Anti-spiritual medicines such as chlorpromazine hydrochloride, amitriptyline hydrochloride, ネ モ Na プ リ De, haloperidol, Luvatren (Cilag-Chemie)., perphenazine, stable, tavor, chlordiazepoxide; Antihistaminic such as Piao Ermin, diphhydramine hydrochloride; Thiamine mononitrate, alpha-tocopherol acetate, commetamin, pyridoxal 5-phosphate, adenosine coenzyme vitamin B ₁₂, vitamin medicaments such as ascorbic acid, nicotiamide; Gout medicines such as allopurinol, colchicine, probenecid; Isoamyl crust rice is appropriate, bromisoval, miaow reach sedative hypnotic such as azoles storehouse, chloral hydrate; Anti-malignant-tumor agents such as fluorouracil, carmofur (power Le モ Off-Le), hydrochloric acid ァ Network ラ Le PVC シ Application, cyclophosphamide, thio-tepa; Antidepressant such as phenylpropanolamine, ephedrines; Rezulins such as acetohexamide, insulin, tolbutamide; Diuretic such as hydrochlorothiazide, polythiazide, triamterene; Bronchodilators such as aminophylline, Off マ Le acid Off ォ Le モ テ ロ-Le, theophylline; Antiarrhythmics such as cough medicine, nitric acid quinidine, digoxigenin formula, propafenone hydrochloride, procainamide such as phosphoric acid can be treated admittedly, narcotine, phosphoric acid dimemorfan, dromethan; Topical anesthetics such as benzocaine, lignocaine, cinchocaine hydrochloride; Antuepileptics such as phenytoin, ethosuximide, primidone; Synthetic adrenal cortex steroids such as hydrocortisone, andrographolide, omcilon, betamethasone; Medicines for central nervous system such as medicines for digestive system such as Off ァ モ チ ジ Application, hydrochloric acid ranitidine, cimetidine, sucralfate, sulpiride (Sulpiride), テ プ レ ノ Application, プ ラ ゥ ノ ト-Le, ィ Application デ ロ キ サ ジ Application, ィ デ ベ ノ Application, Tiapride Hydrchloride, hydrochloric acid PVC Off ェ メ ラ Application, calcium hopantenate; Hyperlipemia therapeutic agents such as プ ラ バ ス チ Application Na ト リ ゥ system; Antibiotics such as hydrochloric acid ampicillin Off リ ジ Le, Cefotetan, josamycin.

In these medicines, representational especially is Licardipine Hydrochloride.In addition, the short medicine of biological half life also can.

The amount of medicine is so long as present the amount of drug effect, no matter what all can, be generally below the 85 weight % of preparation total amount, be preferably below the 80% weight %.

For making these medicines in the few colon of moisture, also be easy to absorb, it is had improved solubility.Improving deliquescent method (can dissolve processing) is to use the known method that aqueogel is suitable for.For example add the method for surfactant (polyoxyethylene hardened castor oil class, polyoxyethylene sorbitan higher fatty acids esters, polyoxyethylene polyoxypropylene glycols, sucrose-fatty esters etc.), with solubilizing agents for drugs such as macromolecule (hydroxypropyl emthylcellulose (HPMC), polyvinylpyrrolidine (PVP), Polyethylene Glycol water soluble polymers such as (PEG), carboxymethylethylcellulose (CMEC), hydroxypropylmethyl cellulose phthalate (HPMCP), polymethyl acrylate-acrylic copolymer (ォ ィ De ラ キ ッ ト レ, S, trade name; ロ-system ァ Application De Ha-ス society system) enteric solubility macromolecule such as) form the method for solid dispersion.When medicine is alkaline matter, organic acid methods such as also available interpolation citric acid, Tartaric acid.In addition as required, also can adopt the method that generates soluble-salt, with the method for formation clathrates such as cyclodextrin.Can do suitably change (the brave ラ in inland sea, medical ジ セ-Na Le) to the method for solubilising by selected medicine.See that nearest preparation technique と そ uses I, 157-159 (1983); And the biological utilization energy of pharmacy モ ノ グ ラ Off No.1, permanent ら, Application Off ト サ ィ ェ Application ス society, the 78-82 (1988) of taking charge of of well forever.

Wherein satisfied is to adopt medicine and solubilizing agent to form solid dispersion, improves deliquescent method (spy opens clear 56-49314 number, FR2460667 number).

Below, for the inner additive that adds of preparation (below be called the hydrophilic base) that makes water immerse preparation of the present invention is to make this hydrophilic base dissolving 1g institute's water requirement (under 20 ± 5 ℃) below 5ml, material below 4ml preferably, dissolubility is high more in water, makes the effect of water immersion preparation just high more.Such hydrophilic base is such as Polyethylene Glycol (PEG, for example trade name PEG 400, PEG1500, PEG4000, PEG6000, PEG2000, Nof Corp.'s system), the such water soluble polymer of polyvinylpyrrolidine (PVP, for example trade name PVP K30 BASF AG system); Sugar alcohols such as D-Sorbitol, xylitol; Saccharides such as white sugar, anhydrous maltose, D-fructose, glucosan (as Gentran 40), glucose; Polyoxyethylene hardened castor oil (HCO, as Cremophor RH40 BASF AG system, HCO-40, HCO-60 day Optical Chemical Company system), polyoxyethylene polyoxypropylene glycols (as プ Le ロ ニ Star Network F68 rising sun electrification corporate system etc.) and polyoxyethylene sorbitan high-grade aliphatic ester (tween, as Tween 80, Northeast chemical company system) surfactant such as; And salt or organic acid such as citric acid, Tartaric acid such as sodium chloride, magnesium chloride; Amino acidses such as glycine, Beta-alanine, lysine hydrochloride; Aminosaccharide such as meglumine.Good especially is PEG 6000, PVP, D-Sorbitol etc.

This hydrophilic ratio that must base, characteristic (dissolubility by medicine, therapeutic effect etc.) all factors such as state of patient determine and when the dissolubility of content, hydrophilic base, the high molecular characteristic that forms hydrogel or administration, and the ratio of almost completely gelation program is for well when being detained on digestive tract top to reach preparation.The time that preparation is detained on digestive tract top is different because of kind, though individual variation is arranged, Canis familiaris L. is after the administration about 2 hours, and the people for after the administration about 4-5 hour (Pharmac. (1988), 26,435-443).After people's administration 4-5 hour, preparation with the ratio that almost reaches complete degree of gelation for well.In general, be the 5-80 weight % of preparation total amount, being good about 5-60 weight %.

If the content of hydrophilic base is less, and gelation does not enter to inside, disengages just insufficient in colon.On the other hand,, carry out gelation at short notice if content is too much, the easy disintegrate of gel, the medicine stripping is too fast, and probably difficulty reaches abundant slow releaseization.And it is many that the amount of base is also wanted, thereby have shortcoming such as preparation maximization itself.

Secondly, as the polymer substance that forms hydrogel, preparation of the present invention must tolerate the digestive tract contractile motion of following food digestion by tool blood under the state of almost completely gelation, the degree that can keep shape to a certain degree to divide a word with a hyphen at the end of a line to digestive tract bottom colon, the character such as viscosity when reaching gelation.

What viscosity was high when the polymer substance of suitable formation hydrogel was with gelation in the preparation of the present invention is good.For example, the viscosity of 1% aqueous solution (25 ℃) is good the above person of 1000cps to serve as the spy.

The character of polymer substance is relevant with molecular weight, and as the polymer substance of the formation hydrogel that may be suitable in preparation of the present invention, the material of higher molecular weight is good more than 2,000,000 with mean molecule quantity, and mean molecule quantity is then better 4,000,000 above persons.

Such polymer substance can be enumerated such as molecular weight at the poly(ethylene oxide) oxide (PEO) more than 2,000,000 (as trade name Polyox WSR-303 (mean molecule quantity: 7,000,000, viscosity: 7500-10000cps (25 ℃ of 1% aqueous solutions)), Polyox WSRCoagulant (mean molecule quantity: 5,000,000, viscosity: 5500-7500cps (concentration and temperature are the same, hereinafter to be referred as the same), Polyox WSR-301 (mean molecule quantity: 4,000,000, viscosity: 1650-5500cps (the same)), Polyox WSR-N-60K (mean molecule quantity: 2,000,000, viscosity: 2000-4000cps (25 ℃ of 2% aqueous solutions)) is connection C.-Chem AG system); Hydroxypropyl emthylcellulose (HPMC) (for example trade name メ ト ロ-ズ 90SH100000 (viscosity: 4100-5600cps (20 ℃ of 1% aqueous solutions)), メ ト ロ-ズ 90SH 50000 (viscosity: 2900-3900cps (the same)), メ ト ロ-ズ 90S30000 (viscosity: 25000-35000cps (20 ℃ of 2% aqueous solutions)) are chemical company of SHIN-ETSU HANTOTAI system); 200,000, viscosity 1200-1800cps (25 ℃ of 1% aqueous solutions)), サ Application ロ-ズ F-1000MC (mean molecule quantity: サ Application ロ-ズ F-300MC (mean molecule quantity: Nippon Paper corporate system 300,000, viscosity 2500-3000cps (the same)) 420,000, viscosity 8000-12000cps (the same)) sodium carboxymethyl cellulose (CMC-Na) (for example, trade name サ Application ロ-ズ F-150MC (mean molecule quantity:; 1,480,000, viscosity 2400-3000cps (25 ℃ of 1% aqueous solutions)), HEC ダ ィ セ Le SE 900 (mean molecule quantity: 1,560,000, viscosity 4000-5000cps (the same)), ダ ィ セ Le chemical industrial company system) or carboxy vinyl polymer (as power-ボ Port-Le 940 (mean molecule quantity about 2,500,000) B.F.Goodrich Chemical corporate system) etc., be the PEO of mean molecule quantity more than 2,000,000 preferably hydroxyethyl-cellulose (HEC) (for example, trade name HEC ダ ィ セ Le SE 850 (mean molecule quantity:.For must be long-time, when continuing to discharge more than 12 hours, (viscosity that is 25 ℃ of 1% aqueous solutions preferably be that the above macromolecule of 3000cps is advisable than macromole (preferably for mean molecule quantity more than 4,000,000) or viscosity higher.

But these one or more mixing of polymer substance that form hydrogel are used.And constitute by two or more polymer substances, the mixture that has suitable character in the invention described above as a whole also can be used as the polymer substance that forms hydrogel of the present invention and suitable applications in addition.

For the people, have the release energy for making at the colon Chinese medicine, after administration, passed through at least 6--8 hour, be through more than 12 hours better, the preparation of gelation must some remain in the colon.

The aqueogel that has such characteristic for formation, also along with the size of preparation, the kind of polymer substance, different by making water immerse in medicine or the preparation additivated character, content etc., the every preparation that 600mg is following, general every ratio that contains the polymer substance that forms hydrogel is the 10-95 millimeter % of preparation total amount, be preferably 15-90 weight %, and the fusion of every tablet preparation being to be advisable more than the 70mg, is more than the 100mg preferably.Be less than this amount, just can not tolerate the etch in the long-time persistent digestive tube, also just may not reach sufficient slow release.

Can confirm that by following experiment its practicality is arranged about the hydrophilic base of the invention described above, the kind and the blended amount that form the polymer substance (below be called hydrogel form base) of hydrogel.Experimental example (hydrophilic base and hydrogel form the kind and the blended amount of base)

(1) the time dependent gel-forming speed of hydrogel slow-releasing agent of the present invention

Sample

Hydrogel forms base Polyox WSR-303 (below be called POLYOX 303) 100 weight portions, and fusion 150 weight portion hydrophilic base PEG 60000 mix in mortar, use hydraulic press, with the pressure tabletting of 1 ton/pestle, get diameter 8.0mm, the tablet of every weight 200mg.

The gel formation test

Adopt Japanese Pharmacopoeia (The Pharmacopoeia of Japan XII) slaking test method the 2nd liquid to make experimental liquid,, test with the 25rpm speed of agitator by Japanese pharmacopeia dissolution test method the 2nd method (paddling process).Per hour take out tablet, peel off gel layer after, measure the diameter (Dobs) of not gelation part.Calculate gelation rate (G) (table 1, Fig. 1, formula 1) by Dobs.

Here, gelation rate represents to form in the tablet ratio of gel section.The method of calculated for gel rate though there are not particular provisions, can following computational methods be an example.

Computational methods are: behind the moistening certain hour of tablet, measure the volume (or weight) of not gelation part, the volume (or weight) of the tablet before on-test is deducted this value, and obtain the gelation rate.

Specifically: peel off the gel layer of the tablet of moistening certain hour, measure the diameter (or thickness) of not gelation part, calculate with formula 1.Similarly, also can obtain the gelation rate from aftermentioned formula 2.

Also can further utilize gel layer and the intensity difference that does not form gel section, the diameter during with bearing certain pressure (or thickness) is regarded the diameter (or thickness) of not gelation part as, calculates the gelation rate by formula 1.

Table 1

The gel formation result of the test

Test period Dobs G

(h) (mm) (％)

08.0±0.0 0

0.5 6.8±0.03 37.9±0.7

1.0 5.8±0.2 61.1±1.8

2.0 4.0±0.05 87.9±0.4

3.0 2.0±0.0 98.4±0.0

4.0 0.0 100

5.0 0.0 100

(n=3, mean value standard error)

Formula

Dobs: after on-test, the diameter of gelation part not

Dini: the preparation diameter before on-test

Result of the test

The hydrogel sheet that contains hydrophilic base PEG 6000 dwindles internal diameter with roughly certain speed, carries out gelation.During 2 hours on-tests, almost completely (more than 80%) gelation.

(2) content of hydrophilic base

Sample

Corresponding to 100 weight parts water gel formation base POLYOX303, in 0 weight portion to 150 weight portion ratio fusion hydrophilic base PEG 6000, in mortar, mix, use hydraulic press, with 1 ton/pestle pressure tabletting, get diameter 8.0mm, the tablet of every weight 200mg.

The gel formation test

Adopt Japanese Pharmacopoeia slaking test method the 2nd liquid to make experimental liquid,, test with the 25rpm speed of agitator by Japanese pharmacopeia dissolution test method the 2nd method (paddling process).Per hour take out tablet, peel off gel layer after, measure the diameter (Dobs) of not gelation part.Calculate gelation rate (G) (table 2, Fig. 2) by Dobs.

Table 2

The gel formation result of the test

Prescription is than POLYOX 303: PEG 6000	G(％)
			2h	4h
	100∶0 100∶5 100∶10 100∶15 100∶25 100∶50 100∶100 100∶150	29.7±2.9 44.2±5.2 52.3±2.5 84.6±0.5 84.6±0.6 85.2±0.6 87.1±0.2 87.9±0.4				50.5±1.4 78.0±2.1 83.9±0.5 91.2±2.0 N.T. N.T. N.T 100.0±0.0

N.T. not test (N.T.) (n=3, average standard error)

Result of the test

Test by fusion hydrophilic base PEG 6,000 15 weight portions (tablet weight 13.0%) shows that 80% above gelation was arranged in the time of 2 hours; Test by fusion hydrophilic base PEG600010 weight portion (tablet weight 9.1%) shows that 80% above gelation was arranged in the time of 4 hours.

(3) screening of hydrophilic base

Sample

Hydrogel forms base POLYOX 303) 100 weight portions, the various hydrophilic bases of fusion 100 weight portions mix in mortar, use hydraulic press, with the pressure tabletting of 1 ton/pestle, get diameter 8.0mm, the tablet of every weight 200mg.

The gel formation test

Adopt Japanese Pharmacopoeia slaking test method the 2nd liquid to make experimental liquid,, test with the 25rpm speed of agitator by Japanese pharmacopeia dissolution test method the 2nd method (paddling process).Take out tablet after 2 hours on-tests, peel off gel layer after, measure the diameter (Dobs) of not gelation part.Calculate gelation rate (G) (table 3, Fig. 3) by Dobs.

Table 3

Deliquescent influence to gelation rate and various additives

Additive dissolubility G

(notes) (%)

Do not have and add 29.7 ± 2.9

Lactose 8ml 24.4 ± 1.9

Mannitol 6ml 26.8 ± 1.9

Inositol 6ml 42.0 ± 1.5

Glycine 4ml 80.9 ± 0.7

PEG20000 4ml 86.2±0.3

Pluronic F68 ^* 4ml 95.1±0.4

PVP K30 2ml 82.2±2.5

Gentran 40 2ml 85.9 ± 1.0

Meglumine 2ml 93.4±0.8

Dextran 2ml 94.2 ± 1.5

Lysine-HCl 2ml 95.1 ± 1.3

Beta-alanine 2ml 99.3 ± 0.2

PEG6000 1ml 87.1±0.2

Citric acid 1ml 93.2 ± 0.3

Bisamylose 1ml 93.7 ± 0.7

Xylitol 1ml 94.0 ± 1.4

Sucrose 1ml 94.2 ± 1.1

Sorbitol 1ml 97.0 ± 0.4

Fructose 1ml 100

* polyoxyethylene (160) polyoxypropylene (30) ethylene glycol

(n=3, mean value standard error)

(notes) are the required water yield (20 ± 5 ℃) of dissolving 1g, measure by the conventional dissolubility assay method of Japanese pharmacopeia.

Result of the test

When adding D-mannitol and lactose, dissolubility needs 6ml or 8ml water respectively for dissolving 1g additive, shows roughly equal gelation rate with independent with POLYOX 303, shows tablet internal gelation weak effect.

The result shows, the high base (dissolving 1g additive institute water requirement at least below 5ml, preferably below 4ml) of dissolubility such as hydrophilic base glycine, PVP K30, PEG 6000, D-sorbitol that reaches 80% above gelation in the time of 2 hours suits.

(4) hydrogel forms the discussion of base

As model drug, done discussion with acetaminophen (acetaminophen) and hydrochloric acid ニ power Le ジ ピ Application (Pb) to forming incorporation and the molecular weight that the required hydrogel of slow releasing preparation forms base.

One is to the discussion of thoroughly suitable blended amount

The blended amount of gel formation base and the relation of stripping situation are sent out in research.

A) acetaminophen

Table 4

Prescription (mg)

Acetaminophen 50 50 50 50 50

PEG6000 50 50 50 50 50

POLYOX303 40 50 100 150 300

Weight (mg) 140 150 200 250 400

Diameter (mg) 6.5 7.0 8.0 8.5 9.5

Composition shown in the mixture table 4 is used hydraulic press in mortar, with 1 ton/pestle pressure tabletting, gets tablet (containing acetaminophen 50mg).

B) hydrochloric acid ニ power Le ジ ピ Application (Pd)

Pd 1 weight portion, HCO-60 0.2 weight portion, hydroxypropyl emthylcellulose (TC-5E, chemistry society of SHIN-ETSU HANTOTAI system) 0.4 weight portion are dissolved in water-methanol mixture (1: 9), carry out spray drying with spray dryer, products therefrom is promptly as spray drying product 1.

Table 5

Prescription (mg)

Spray drying product 1 128 128 128 128 128 128 128

PEG6000 32 32 32 32 32 32 32

POLYOX303 64 96 120 160 200 240 320

Weight (mg) 224 256 280 320 360 400 460

Diameter (mg) 8.5 8.5 8.5 9.0 9.0 9.5 10.0

Composition shown in the mixture table 5 is used hydraulic press in mortar, with 1 ton/pestle pressure tabletting, gets tablet (containing Pd 80mg).

Dissolution test

Adopt Japanese Pharmacopoeia slaking test method the 1st liquid or the 2nd liquid as experimental liquid, by Japanese pharmacopeia dissolution test the 2nd method (paddling process), Abensanil and hydrochloric acid ニ power Le ジ ピ Application (Pd) model preparation are tested.Per hour sampling, dose is measured (Fig. 4, Fig. 5) by the UV method in the solution.

Result of the test

Can form the content control dissolution rate of base POLYOX 303 by hydrogel.When being principal agent with acetaminophen 50mg, fusion POLYOX303 content is more than 100mg (tablet weight 50%), even (speed of agitator 200rpm pH6.8) also can continue to discharge more than 12 hours under very fast the stirring.Equally, with Pd 80mg during as principal agent, fusion POLYOX 303 content 96mg (tablet weight 37.5%), (speed of agitator 200rpm pH1.2) also can continue to discharge more than 12 hours under very fast the stirring.

Hydrogel form the suitable content ratio of base with the kind of medicament and hydrophilic base and amount and desired dissolution rate and different, experiment shows that content ratio is big more, then release is slow more.When expectation continued to discharge more than 12 hours, every must contain more than about 70mg, was that the above hydrogel of 100mg forms base preferably.

Its two, studied the relation of gel formation base molecular weight and release duration.

A) acetaminophen

Table 6

Prescription (weight portion)

Acetaminophen 50

PEF6000 50

Poly(ethylene oxide) (PEO) 250

Used poly(ethylene oxide) mean molecule quantity is 900,000,1,000,000,2,000,000,4,000,000,5,000,000 or 7,000,000.Mix in mortar, use hydraulic press, with 1 ton/pestle pressure tabletting, get diameter 9.0mm, a kind of weight is the tablet of 350mg

B) hydrochloric acid ニ power Le ジ ピ Application (Pb)

With Pd 1 weight portion, HCO-400.4 weight portion, hydroxypropyl emthylcellulose (TC-5E, SHIN-ETSU HANTOTAI's corporate system) the water-soluble methyl alcohol mixed liquor of 0.8 weight portion (1: 9), spray-dried, product is spray drying product 2.

Table 7

Tablet formulation (weight portion)

Spray drying product 2 178

PEG 6000 48

Poly(ethylene oxide) (PEO) 344

Used poly(ethylene oxide) (PEO) molecular weight is 900,000,1,000,000,2,000,000,4,000,000 or 7,000,000.In mortar, mix, use hydraulic press,, get the tablet (containing Pd 80mg) of diameter 11.0mm, a slice weight 568mg with 1 ton/pestle pressure tabletting.

Dissolution test

With aforementioned 1 dissolution test of doing about suitable blended amount institute similarly, Abensanil prescription preparation and hydrochloric acid ニ power Le ジ ピ Application prescription preparation are handled (Fig. 6, Fig. 7).

Result of the test

Dissolution rate changes with the mean molecule quantity that hydrogel forms base poly(ethylene oxide) (PEO).When principal agent was used acetaminophen 50mg, used PEO mean molecule quantity was the grade more than 4,000,000, even if under very fast the stirring (speed of agitator 200rpm, pH6.8), also sustainable release is more than 12 hours.

Equally, when making principal agent with Pd 80mg, the PEO of usefulness is the grade of mean molecule quantity more than 2,000,000, and sustainable release is more than 12 hours.

(5) form the confirmation of gel in vivo

Sample

Form base (POLYOX 303) with respect to hydrogel, add hydrophilic base (PEG 6000, PVP K30, D-sorbitol) by following mix proportions, in mortar, mix, use hydraulic press, with 1 ton/pestle pressure tabletting, diameter 8.0mm, a slice weight are the tablet of 200mg.

POLYOX 303∶PEG6000＝100∶10，25，50，100

POLYOX303∶PVP K30＝100∶10，25，100

POLYOX 303: D-sorbitol=100: 10,25,100

Canis familiaris L. is dissected test

The male beagle about 20 hours to the fasting thing (DOG A, B) per os is given and various preparations, and water 30ml takes.After sodium pentobarbital anesthesia, blood-letting, open the abdominal cavity after 2 hours.In digestive tract, reclaim tablet, measure Dobs.Calculate gelation rate (G) (table 8) by Dobs.

Table 8

Canis familiaris L. is dissected result of the test DOG institute and reclaims the in vitro tests of position dissection result of the test to sample

(POLYOX303 100：) D obs G(％) G(％)

A PEG6000 10 colons 6.8 38.6 52.3

PEG6000 25 colons 2.8 95.7 84.6

PEG6000 50 colons do not detect 100 85.2

PEG6000 100 colons do not detect 100 87.1

PVP K30 100 colons do not detect 100 82.2

D-ソ Le PVC ト-Le 100 colons do not detect 100 97.0

B PEG6000 10 stomaches 3.2 93.6 52.3

PEG6000 25 stomaches 2.9 95.2 84.6

PVP K30 10 stomaches 2.5 96.9-

PVP K30 25 stomaches 2.9 95.2-

D-ソ Le ヒ ト-Le 10 stomaches 2.3 97.6-

D-ソ Le PVC ト-Le 25 stomaches 2.9 95.2-

Result of the test

After the Canis familiaris L. A administration 2 hours, tablet moved to colon, is below 2 hours in the digestive tract top holdup time.Yet, except that fusion the tablet of 600010 parts of PEG, amount to 80% above gelation, roughly corresponding with the in vitro tests result.

After the Canis familiaris L. B administration 2 hours, tablet was trapped in gastric, existing 80% above gelation.

Above result shows, can reach an amount of hydrogel tablet of hydrophilic base (PVP K30, PEG6000, D-sorbitol) fusion of 80% above gelation in vitro tests, and water also can immerse tablet inside in the test in vivo, and is easy to gelation.

As required, in preparation of the present invention, can add other pharmaceutically permissible additives, as excipient, binding agent, disintegrating agent, lubricant, aromatic, coloring agent, antiseptic, solubilizing agent, surfactant etc.

Preparation of the present invention is to have hydrogel to form energy, effigurate solid preparation, its preparation method is that any method that is suitable for common aqueogel all can, for example, medicine hydrophilic base is formed the polymer substance of hydrogel, also can add other additives on demand, mix, the pressed disc method of compression molding, or the extrusion forming process that the mixture melt after fixing is shaped, injection molding method etc.Also can carry out common sugar coating, film coating after the shaping and handle, but or also capsule charge after being shaped.

The medicine that is suitable in the preparation of the present invention is carried out solubilising when handling, can carry out before being made into preparation above-mentioned.But also double as solubilizing agent of hydrophilic base of the present invention for example, also can also can add other additives and tabletting with the hydrophilic base and on demand by the medicine and the polymer substance that forms hydrogel of other additive solubilisings as required.

Slow releasing preparation of the present invention also can contain on demand releases part soon, for example, can wrap up on preparation of the present invention to release part soon.

According to medication purpose difference, can be made into the nuclear tablet.For example, when behind certain hour, requiring to reach higher blood concentration, with the medicine dissolution rate fast (as increasing medicament contg, reducing hydrogel forms base and/or increases hydrophilic base content etc.) write out a prescription and make sheet nuclear, outer layer segment then makes the medicine dissolution rate slow down (to reduce medicament contg, increasing hydrogel forms base content and/or reduces hydrophilic base content), the medicine dissolution rate is accelerated.

Fig. 1 represents to contain the gel formation result of the test of the hydrogel slow releasing preparation of PEG 6000.

Gel formation result of the test when Fig. 2 represents to change PEG 6000 content.

Fig. 3 represents the result of the gelation rate of various hydrophilic bases after 2 hours.

Fig. 4 represents the incorporation of POLYOX 303 and the relation (medicine: acetaminophen) of stripping situation.

Fig. 5 represents the incorporation of POLYOX 303 and the relation of stripping situation (medicine: hydrochloric acid ニ power Le ジ ピ Application).

Fig. 6 represents the relation (medicine: acetaminophen) of PEO molecular weight and stripping situation.

Fig. 7 represents the relation (medicine: hydrochloric acid ニ power Le ジ ピ Application) of PEO molecular weight and stripping situation.

Fig. 8 represents embodiment 1 and 1 the paddling process dissolution test result of relatively writing out a prescription.

Fig. 9 represents embodiment 1 and relatively writes out a prescription 1 gel formation result of the test.

Figure 10 represents the result that embodiment 1 and 1 the dog plasma Chinese medicine concentration of relatively writing out a prescription are passed.

Figure 11 represent relatively to write out a prescription 1 dissolution test result with by going flatung (Deconvolution) method gained to absorb the comparison of situation.

The dissolution test result that Figure 12 represents embodiment 1 with by going flatung method gained to absorb the comparison of situation.

Figure 13 represents the variation of embodiment 2 and 2 the dog plasma Chinese medicine concentration of relatively writing out a prescription.

Figure 14 represents embodiment 3 (SR) and the paddling process dissolution test result of 3 (SR) that relatively write out a prescription.

Figure 15 represents the variation of embodiment 3 and 3 the dog plasma Chinese medicine concentration of relatively writing out a prescription.

Figure 16 represents the paddling process dissolution test result of embodiment 4 and 5.

Figure 17 represents the paddling process dissolution test result of embodiment 6,7 and 10.

Figure 18 represents embodiment 12 and 4 the paddling process dissolution test result of relatively writing out a prescription.

Figure 19 represents embodiment 12 and 4 the dog plasma Chinese medicine concentration change of relatively writing out a prescription.

Below illustrate in greater detail preparation of the present invention.And the present invention is not subjected to any restriction of these embodiment.Embodiment 1

AAP 100 (weight portion)

PEG 6000 400

POLYOX 303 300

After 80 ℃ of fusings, cooling curing is pulverized with acetaminophen (AAP) and PEG 6000.Ground product mixes in mortar with POLYOX 303, and with 1 ton/pestle pressure tabletting, getting diameter is that 9mm, a slice weight are the 400mg tablet of (containing AAP 50mg) with hydraulic press.Relatively write out a prescription 1

AAP 100 (weight portion)

POLYOX 303 200 mixes with POLYOX 303 AAP in mortar, with 1 ton/pestle pressure tabletting, getting diameter is that 8.5mm, a slice weight are the 300mg tablet of (containing AAP 100mg) with hydraulic press.

1 carry out following test with regard to above-mentioned gained embodiment 1 with relatively writing out a prescription.

(1) dissolution test

, test as experimental liquid with Japanese Pharmacopoeia slaking test method the 2nd liquid by Japanese pharmacopeia dissolution test method the 2nd method (paddling process).Per hour sampling is with the APP (table 9, Fig. 8) in the UV method mensuration solution

Table 9

External dissolution test result (%) (pharmacopeia side's 2 liquid, stirring 200rpm)

Time (h) 0.0 0.5 1.0 2.0 3.0 4.0 6.0 8.0 10.0 12.0

Relatively write out a prescription 1 0.0 9.4 15.7 25.8 34.7 42.8 56.5 68.3 78.4 86.4

Embodiment 1 0.0 8.8 13.2 21.8 32.4 39.1 55.3 69.2 81.9 92.1

(2) gel formation test

Adopt Japanese Pharmacopoeia slaking test method the 1st liquid or the 2nd liquid as experimental liquid,, test with the 25rpm speed of agitator by Japanese pharmacopeia dissolution test the 2nd method (paddling process).Per hour take out tablet, measure the diameter (S obs) of not gelation part.Calculate gelation rate (G) (table 10, Figure 10) by D obs.

Table 10

Gel formation result of the test preparation test period D obs G

(h) (mm) (％)

0 8.5 -

2 7.8 ± 0.2 21.5 ± 7.6 relatively write out a prescription 14 7.5 ± 0.1 30.0 ± 2.5

6 6.7±0.1 50.4±3.0

0 9.0 -

2 5.6 ± 0.03 76.2 ± 0.3 embodiment 14 3.1 ± 0.01 96.0 ± 0.1

6 0±0.00 100.0±0

(n=3, average standard error)

(3) to the medicine-feeding test of dog

The male beagle (n=4) that fasting is about 20 hours, the tablet of oral administration and embodiment 12 (AAP 100mg) and 1 (the AAP 100mg) that relatively write out a prescription use the 30ml water delivery service.The time dependent blood sampling is measured blood plasma Chinese medicine concentration (table 11, Figure 10) with high-pressure liquid phase/ultraviolet spectra (HPLC/UV) method.With AAP 100mg aqueous solution iv throw with the time blood plasma Chinese medicine concentration data as the weight function, by going the flatung method to calculate infiltration rate.With the tablet throwing of embodiment and back 24 hours absorbance is 100 (tables 12).

Table 11

Pharmacokinetic parameter

Preparation AUC 0-24 Cmax T max MRT

(ng·h/ml) (ng/ml) (h) (h)

Relatively write out a prescription 1 1469.7 ± 537.5 343.7 ± 21.7 1.3 ± 0.3 4.0 ± 1.2

Embodiment 1 2702.8 ± 151.5 349.9 ± 36.1 1.5 ± 0.3 7.0 ± 0.3

(n=4, mean value standard error)

Table 12

Absorbance (%) when giving the Canis familiaris L. oral tablet

Time (h) 0.0 0.5 1.0 2.0 3.0 4.0 6.0 8.0

Relatively write out a prescription 1 0.0 8.1 18.7 27.2 33.3 37.8 45.9 50.3

Embodiment 1 0.0 7.5 14.3 31.0 39.1 45.9 60.2 75.5

Time (h) 10.0 12.0 24.0

Relatively write out a prescription 53.1 55.4 58.8

Embodiment 87.4 95.6 100.0

Result of the test

In external dissolution test, relatively writing out a prescription 1 shows roughly the same stripping situation (Fig. 8, table 9) with embodiment 1, and water immerses speed (gelation rate) greatly different (Fig. 9, table 10).These preparations are given the oral result of Canis familiaris L., with relatively write out a prescription 1 throw with the time compare, embodiment 1 throw with the time blood plasma Chinese medicine concentration pass lasting (Figure 10) significantly.And, when relatively writing out a prescription 1 administration under the blood plasma Chinese medicine Cot curve in area (AVC) and the average body deviation of holdup time (MRT) big, this is because due to the individual variation of peristalsis of the digest tract time (table 11) for deducibility.In contrast to this, embodiment 1 throw with the time AUC and MRT deviation little, prompting is not subject to the influence of peristalsis of the digest tract speed.Again since soak time continue, embodiment 1 throw with the time maximum plasma Chinese medicine concentration (Cmax) though with relatively write out a prescription 1 throw with the time about equally, AUC increases 1.8 times approximately.

Will be by going flatung method gained absorption situation and dissolution test result to make comparisons.Gave relatively to write out a prescription 1 o'clock, preparation was detained on digestive tract top about 2 hours; Show same absorption with external stripping result, and 2 hours are subjected to obvious inhibition (Figure 11, table 12) with next absorption.Studies show that Canis familiaris L. is about 2 hours in the fasted conditions lower digestive tract top holdup time, medicine is difficult to stripping, absorption in the digestive tract bottom.In contrast, when giving, roughly equal absorption is arranged with external dissolution test result with embodiment 1.Promptly studies show that the same with digestive tract top, even at digestive tract bottom medicine also by stripping well, absorption (Figure 12, table 12).

(4) Canis familiaris L. is dissected test

With 3 of the about 20 hours male beagles of fasting, before dissection 2,4 and 6 hours, oral administration and various preparation were with the 30ml water delivery service.Under pentobarbital sodium anesthesia, blood-letting, cut open the belly, dissect and check the position (table 13) of preparation in digestive tract.Small intestinal is divided into 5 five equilibriums, begins to be called respectively small intestinal 1,2,3,4 and 5 from top.Result of the test:

Position in table 13 digestive tract

	DOG No

	2 hours	4 hours	6 hours
				Relatively write out a prescription 1	1 2 3	The colon stomach-intestinal	Colon colon colon	Colon colon colon
Embodiment
	1	1 2 3	Colon stomach-intestinal 5	Colon small intestinal 1 colon	Colon colon colon

The gelation rate is low, and 1 embodiment 1 that has improved the gelation rate with fusion hydrophilic base that relatively writes out a prescription shows in the same digestive tract in test in vivo mobile.After the administration 2 hours, two preparations all have 1 example to be detained under one's belt, and remaining is present in small intestinal 5 and colon.Thereby so far finding shows that preparation is about 2 hours in the digestive tract top holdup time under the Canis familiaris L. fasted conditions.During promptly with embodiment 1 administration, high blood concentration and preparation shown after 2 hours are irrelevant in the existence of digestive tract bottom, and it is good to be considered to result from medicine stripping from preparation, absorbs fully.

Embodiment 2

Pd 160 (weight portion)

HCO-60 80

TC-5E 160

PEG6000 400

POLYOX303 240

Hydrochloric acid ニ power Le ジ ピ Application (Pd), HCO-60, TC-5E and PEG 6000 are dissolved in the mixed solvent (methylene chloride-methanol), carry out spray drying with spray dryer.Dry product is mixed in mortar with POLYOX303, and with 1 ton/pestle pressure tabletting, getting diameter is that 9.0mm, a slice weight are the 346.7mg tablet of (containing Pd 53.3mg) with hydraulic press.

Relatively write out a prescription 2

Pd 130 (weight portion)

Tween 80 26 slow-released parts (SR)

CMEC 130

POLYOX303 57.2

Pd 30 releases part (QR) soon

TC-5E 15

Hydrochloric acid ニ power Le ジ ピ Application (Pd), Tween 80 and CMEC are dissolved in the mixed solvent (methylene chloride-methanol), carry out spray drying with spray dryer.Dry product mixes in mortar with POLYOX303, and with 0.8 ton/pestle pressure tabletting, getting diameter is that 8.0mm, a slice weight are the 171.6mg tablet of (containing Pd65mg) (SR) with hydraulic press.Again Pd and TC-5E are dissolved in the mixed solvent (methylene chloride-methanol), wrap on SR (Pd 65mg) with high speed coating machine and release part (QR, Pd 15mg) soon, get the relatively prescription 2 (Pd 80mg) of the heavy 194.1mg of a slice.

To the embodiment 2 of above-mentioned gained with relatively write out a prescription and 2 carry out following test.

(1) dissolution test

Adopt Japanese Pharmacopoeia slaking test the 1st liquid as experimental liquid, by Japanese pharmacopeia dissolution test method the 2nd method (paddling process), 200rpm tests with speed of agitator.Per hour sampling is with the Pd (table 14) in the UV method mensuration solution.

Table 14

The dissolution test result

Time (h) 1.0 2.0 3.0 4.0 5.0 6.0 8.0 10.0 12.0

Relatively write out a prescription 2 11.9 29.4 46.4 61.9 74.4 82.1 92.1 97.7 100.0

(SR)

Embodiment 2 14.0 28.7 45.1 60.5 73.1 82.2 94.3 99.8 99.3

(2) gel formation test

Adopt Japanese Pharmacopoeia slaking test method the 1st liquid to make experimental liquid,, test with the 25rpm speed of agitator by Japanese pharmacopeia dissolution test method the 2nd method (paddling process).Take out tablet after 2 hours, measure the diameter (D obs) of not gelation part.Calculate gelation rate (G) (table 15) by D obs.

Table 15

The gel formation result of the test

Preparation test period Dobs G

(h) (mm) (％)

Relatively write out a prescription 20 8.0-

(SR) 2 no changes 0

Embodiment 20 9.0-

2 5.4±0.02 76.2±0.3

(n=3, mean value standard error)

(3) dog is thrown and test

The male beagle (n=6) that fasting is about 20 hours, the tablet of oral administration and embodiment 23 (Pd 160mg) and 3 in 2 the tablet of relatively writing out a prescription are used the 30ml water delivery service.Through time ground blood sampling, measure blood plasma Chinese medicine concentration (table 16, Figure 13) with high-pressure liquid phase/ultraviolet spectra (HPLC/UV) method.

Table 16

Pharmacokinetic parameter

Preparation AUC C max T max

(ng·/ml) (ng/ml) (h)

Embodiment 2 (Pd 160mg) 375.7 ± 89.3 52.9 ± 15.5 7.3 ± 3.5

2 (Pd 160mg) 125.0 ± 31.8 53.6 ± 12.5 1.3 ± 0.2 relatively writes out a prescription

(n=6, mean value standard error)

Result of the test

In external dissolution test, relatively writing out a prescription 2 shows roughly the same stripping situation (table 14) with embodiment 2, and water immerses speed (gelation rate) greatly different (table 15).These preparations are given the oral result of Canis familiaris L., with relatively write out a prescription 2 throw with the time compare, embodiment 2 throw with the time blood plasma Chinese medicine concentration pass lasting (Figure 10) significantly.Throw and relatively write out a prescription 2 o'clock, preparation is after dividing a word with a hyphen at the end of a line 2 hours to the digestive tract bottom, and blood plasma Chinese medicine concentration significantly reduces, and shows at digestive tract bottom medicine to go out than indissoluble, absorbs.In contrast to this, embodiment 2 throw and the time, after dividing a word with a hyphen at the end of a line 2 hours in the digestive tract bottom, blood plasma Chinese medicine concentration also continues constant, show the medicine stripping of digestive tract bottom, absorb good.Again since soak time continue, though embodiment 2 throw with the time Cmax with relatively write out a prescription 2 throw with the time about equally, AUC increases 3.0 times approximately.

Embodiment 3

Pd 65 (weight portion)

Tween 80 13 slow-released parts (SR)

CMEC 65

PEG 6000 65

POLYOX303 65

Pd 15 releases part (QR) soon

Hydrochloric acid ニ power Le ジ ピ Application (Pd), Tween 80 and CMEC are dissolved in the mixed solvent (methylene chloride-methanol), carry out spray drying with spray dryer.Dry product mixes with PEG6000 and POLYOX303, with 1.0 tons/pestle pressure tabletting, gets the tablet (SR) of diameter 8.5mm, a slice weight 273mg (containing QR, Pd65mg) with hydraulic press.

Also mention another kind and contain Pd 15mg for releasing the tablet of part soon.

3 Pd 65 (weight portion) Tween 80 13 slow-released parts (SR) CMEC, 65 POLYOX303,28.6 Pd 15 that relatively write out a prescription release part (QR) TC-5E 7.5 soon

Hydrochloric acid ニ power Le ジ ピ Application (Pd), Tween 80 and CMEC are dissolved in the mixed solvent (methylene chloride-methanol), carry out spray drying with spray dryer.Dry product mixes with POLYOX303, with 0.8 ton/pestle pressure tabletting, gets the tablet (SR) of diameter 8.0mm, a slice weight 171.6mg (containing Pd65mg) with hydraulic press.In addition, Pd and TC-5E are dissolved in the mixed solvent (methylene chloride-methanol), wrap on SR (Pd 65mg) with high speed coating machine and be interpreted into branch (QR, Pd 15mg) soon, get the tablet (Pd 80mg) of a slice weight 194.1mg.

(1) dissolution test

Adopt Japanese Pharmacopoeia slaking test method the 2nd liquid as experimental liquid,, test with the 200rpm speed of agitator by Japanese pharmacopeia dissolution test the 2nd method (paddling process).Per hour sampling records Pd in the solution with ultraviolet spectra (UV) method.

The dissolution test of 3 (SR) and embodiment 3 (SR) of relatively writing out a prescription the results are shown in Figure 14.

(2) gel formation test

Adopt Japanese Pharmacopoeia slaking test method the 1st liquid to make experimental liquid,, test with the 25rpm speed of agitator by Japanese pharmacopeia dissolution test method the 2nd method (paddling process).Take out tablet after 2 hours, peel off gel layer after, measure the weight (W obs) of not gelation part.Calculate gelation rate (G) (table 17) with following formula 2 by W obs.

Table 17

Gel formation result of the test (n=3, mean value standard error)

Preparation test period Wobs G

(h) (g) (％)

Relatively write out a prescription 30 0.167-

(SR) 2 0.153±0.0 8.2±1.4

Embodiment 30 0.276-

(SR) 2 0.055±0.4 79.6±0.4

Formula 2 $(\%)=(1-\frac{\left(\mathrm{Wobs}\right)}{\left(\mathrm{Wini}\right)})\×100$

Wobs: peel off the weight behind the gel layer after on-test

Wini: the tablet weight before on-test

(3) to the medicine-feeding test of Canis familiaris L.

The male little harrier (n=6) of fasting after about 20 hours, oral administration and embodiment 3SR and QR each 2 (Pd 160mg) and 32 in the tablet (Pd160mg) of relatively writing out a prescription, water 30ml takes.Every the certain hour blood sampling, measure blood plasma Chinese medicine concentration (Figure 15, table 18) with the HPLC/UV method.

Table 18

Pharmacokinetic parameter (n=6, mean value standard error) preparation AUC 0-24 C max T max MRT AUC (ngh/ml) is (h) (h) (ng/ml) 3 125.0 ± 31.8 53.6 ± 12.5 1.3 ± 0.2 2.4 ± 0.4 embodiment 3 547.1 ± 180.4 81.6 ± 14.8 3.9 ± 1.1 6.3 ± 1.0 of relatively writing out a prescription (ng/ml)

(4) Canis familiaris L. is dissected test

With 3 of the about 20 hours male little harriers of fasting, before dissection 2,4 and 6 hours, oral administration and various preparation were with the 30ml water delivery service.Under pentobarbital sodium anesthesia, blood-letting, cut open the belly, dissect and check the position (table 19) of preparation in digestive tract.Small intestinal is divided into 5 five equilibriums, begins to be called respectively small intestinal 1,2,3,4 and 5 from top.

Position (small intestinal divides 5 five equilibriums) in table 19 digestive tract

	DOG No

	2 hours	4 hours	6 hours
				Relatively write out a prescription 3	4 5 6	Colon stomach-intestinal 1	Colon colon colon	Colon colon colon
Embodiment
	3	4 5 6	Small intestinal 5 colon small intestinals 1	Colon colon colon	Colon colon colon

Result of the test

In external dissolution test, show relatively write out a prescription 3 with embodiment 3 (SR) stripping situation roughly the same (Figure 14), and gelation rate greatly different (table 17).The result of anatomy experiment, embodiment 3 and the roughly the same digestive tract internal migration (table 19) of 3 demonstrations of relatively writing out a prescription.These preparations are given the oral result of Canis familiaris L., 3 compare with relatively writing out a prescription, embodiment 3 throw with the time plasma drug level pass obviously lasting.With relatively write out a prescription 3 throw and the time, preparation is after dividing a word with a hyphen at the end of a line 2 hours in the digestive tract bottom, blood plasma Chinese medicine concentration significantly reduces, and shows at digestive tract bottom medicine to go out, absorb than indissoluble.In contrast to this, with embodiment 3 throw and the time, after dividing a word with a hyphen at the end of a line 2 hours in the digestive tract bottom, blood plasma Chinese medicine concentration also continues constant, shows that in the digestive tract bottom medicine stripping absorbs good (Figure 15).Continue as can be known by soak time again, though with embodiment 3 throw with the time Cmax with relatively write out a prescription 3 throw with the time about equally, AUC increases 4.4 times (table 18) approximately.

Embodiment 4

Pd 80(mg)

PVP K30 32

HCO-60 16

POLYOX303 240

Lubricant 4

Hydrochloric acid ニ power Le ジ ピ Application (Pd), PVP K30 and HCO-60 are dissolved in the methanol., granulate on the solution spray agent POLYOX303 with fluidization granulator.Add lubricant, mixing, tabletting, getting diameter is 9.5mm, a slice weight is the 372mg tablet of (containing Pd80mg).

Embodiment 5

Pd 80(mg)

TC-5E 32

HCO-60 16

PEG6000 32

POLYOX303 240

Lubricant 8

Fluidizing reagent 4

Hydrochloric acid ニ power Le ジ ピ Application (Pd), TC-5E3 and HCO-60 are dissolved in water-methanol mixture (1: 9), with this solution spray drying.Add POLYOX 303, lubricant 4mg, carry out dry granulation.In the product of granulating, add lubricant 4mg and fluidizing reagent, mix, tabletting, tablet that must diameter 9.5mm, a slice weight 412mg (containing Pd 80mg).

Embodiment 6

Pd 80(mg)

TC-5E 32

HCO-60 32

PEG6000 32

POLYOX303 384

Lubricant 11.2

Fluidizing reagent 5.6

Hydrochloric acid ニ power Le ジ ピ Application (Pd), TC-5E3 and HCO-60 are dissolved in water-methanol mixture (1: 9), with this solution spray drying.In the spray drying product, add POLYOX 303, lubricant 5.6mg, dry granulation.In the product of granulation, add lubricant 4mg and fluidizing reagent, mix, tabletting, getting diameter is that 11mm, a slice weight are the tablet of 576.8 (containing Pd 80mg).

Embodiment 7

Pd 80(mg)

TC-5E 64

Tween 80 32

PEG6000 32

POLYOX303 360

Lubricant 11.4

Fluidizing reagent 5.7

Hydrochloric acid ニ power Le ジ ピ Application (Pd), TC-5E and Tween 80 are dissolved in water-methanol mixture (1: 9), with the solution spray drying.In the spray drying product, add PEG60000, POLYOX 303, lubricant 5.7mg, carry out drying and granulating.In the product of granulation, add lubricant 5.7mg and fluidizing reagent, mix, tabletting, getting diameter is 11mm, a slice weight is the 585.1mg tablet of (containing Pd 80mg).

Embodiment 8

Pd and TC-5E are dissolved in the water-methanol mixture (1: 9),, on embodiment 7 (Pd 80mg), wrap and release part (Pd 200mg) soon, get the tablet (Pd 100mg) of a slice weight 625.1mg with high speed coating machine.

Embodiment 9

Pd and HPL-SL are dissolved in the methanol, wrap on embodiment 7 (Pd80mg) with high speed coating machine and release part (Pd 20mg) soon, getting a slice weight is the tablet (Pd 100mg) of 625.1mg.

Embodiment 10

Pd 80(mg)

TC-5E 64

HCO 80 32

PEG6000 48

POLYOX303 344

Lubricant 11.4

Fluidizing reagent 5.7

With Pd, TC-5E and HCO-40 water-soluble-methanol mixed overworked (1: 9) in, with this solution spray drying.In the spray drying product, add PEG6000, POLYOX303, lubricant 5.7mg, dry granulation.In the granule product, add lubricant 5.7mg and fluidizing reagent, mix, tabletting, getting diameter is that 11mm, a slice weight are the 585.1mg tablet of (containing Pd 80mg).

Embodiment 11

Pd 100(mg)

TC-5E 80

HC0-40 40

PEG6000 48

POLYOX303 300

Lubricant 11.4

Fluidizing reagent 5.7

Pd, TC-5E and HCO-40 are dissolved in the water-methanol mixture (1: 9), with this solution spray drying.In the spray drying product, add PEG6000, POLYOX303, lubricant 5.7mg, dry granulation.In the granule product, add lubricant 5.7mg and fluidizing reagent, mixing, tabletting, getting a slice weight is the 585.1mg tablet of (containing Pd 100mg).

(1) dissolution test

Adopt Japanese Pharmacopoeia slaking test method the 1st liquid as experimental liquid,, test with the 200rpm speed of agitator by Japanese pharmacopeia dissolution test the 2nd method (paddling process).Per hour sampling is with the Pd in the UV method mensuration solution.

Embodiment 4 the results are shown in Figure 16 with the dissolution test of implementing 5.

Embodiment 6, embodiment 7 the results are shown in Figure 17 with the dissolution test of embodiment 10.

(2) Canis familiaris L. medicine-feeding test

Give male little harrier (n=6), continuous 4 days of every day 1 time, throwing and 5 two of embodiment or embodiment were 6 two.Through time ground blood sampling, measure blood plasma Chinese medicine concentration with the HPLC/UV method.

Result of the test

With embodiment 5 and 6 homogeneous sky single administrations, high C24h value that shows (administration 24 hours bleeding from anus in concentration) and high bioavailability (AUC).

Embodiment 12

DF 37.5(mg)

PEG6000 37.5

POLYOX303 75.0

ジ Network Off ェ Na ッ Network Na (DF), PEG 6000 and POLYOX303 are mixed in mortar, and with 1 ton/pestle pressure tabletting, getting diameter is 7mm with hydraulic press, and a slice weight is the tablet of 150mg (DF 37.5mg).

Relatively write out a prescription 4

DF 37.5(mg)

POLYOX303 75.0

DF is mixed in mortar with POLYOX 303, and with 1 ton/pestle pressure tabletting, getting diameter is that 6.0mm, a slice weight are the 112.5mg tablet of (containing DF 37.5mg) with hydraulic press.

(1) dissolution test

Adopt Japanese Pharmacopoeia slaking test method the 2nd liquid as experimental liquid, test by Japanese pharmacopeia dissolution test method the 2nd method (paddling process).Per hour sampling is with the DF (Figure 18) in the UV method mensuration solution.

(2) gel formation test

Adopt Japanese Pharmacopoeia slaking test method the 2nd liquid as experimental liquid,, test with the 25rpm speed of agitator by Japanese pharmacopeia dissolution test method the 2nd method (paddling process).Take out tablet in per 2 hours, and measured the diameter (D obs) of not gelation part.Calculate gelation rate (G) (table 20) by D obs.

Table 20

Gel formation result of the test (n=3, mean value standard error)

Preparation test period G

(h) (％)

Embodiment 12 2 88.2 ± 1.1

Relatively write out a prescription 42 37.0 ± 4.6

(3) dog medicine-feeding test

To the about 20 hours male beagle (n=5) of fasting with embodiment 12 (DF37.5mg) and relatively write out a prescription 4 oral with 30ml water.Blood sampling is on time measured blood plasma Chinese medicine concentration (table 21, Figure 19) with the HPLC/UV method.

Table 21

Oral (fasting) test preparation AUC 0-12 C max T max

(ngh/ml) (ng/ml) (h) 4 5052 ± 1,357 1188 ± 147 1.7 ± 0.6 embodiment 12 8537 ± 1,941 1381 ± 222 3.0 ± 1.3 of relatively writing out a prescription

(n=5, mean value standard error)

Result of the test

In external dissolution test, the embodiment 12 and the roughly the same stripping situation (Figure 18) of 4 demonstrations of relatively writing out a prescription, and water immerses speed (gelation rate) greatly different (table 20).These preparations are given the oral result of Canis familiaris L., with relatively write out a prescription 4 throw with the time compare, embodiment 12 throw with the time blood plasma Chinese medicine concentration pass lasting (Figure 19) significantly.And, 4 compare with relatively writing out a prescription, embodiment 12 throw with the time AUC increase 1.7 times (table 21) approximately.Even promptly the acidic drug diclofenac sodium also is suitable for the present invention, determines in the medicine stripping of digestive tract bottom thus, absorb well.

Embodiment 13

DF 75(mg)

PEG6000 75

POLYOX303 150

Diclofenac sodium (DF), PEG6000 and POLYOX303 are mixed in mortar, and with 1 ton/pestle pressure tabletting, getting diameter is 8.5mm with hydraulic press, and a kind of weight is the 300mg tablet of (containing DF75mg).

Embodiment 14

DF 75(mg)

PEG6000 75

POLYOX303 300

Diclofenac sodium (DF), PEG6000 and POLYOX303 are mixed in mortar, and with 1 ton/pestle pressure tabletting, getting diameter is 9.5mm with hydraulic press, and a kind of weight is the 450mg tablet of (containing DF75mg).

Embodiment 15

ファモチジン 40(mg)

PEG6000 30

POLYOX303 150

Lubricant 2

With tabletting after Off ァ モ チ ジ Application, PEG6000, POLYOX303 and the mix lubricant, getting diameter is that 80mm, a slice weight are the 222mg tablet of (containing Off ァ モ チ ジ Application 40mg).

Embodiment 16

Hydrochloric acid バ Le ニ ジ ピ 15 (mg)

TC-5E 30

HCO-40 5

PEG20000 40

POLYOX303 207

Lubricant 3

Hydrochloric acid バ Le ニ ジ ピ Application, TC-5E and HCO-40 are dissolved in the water-methanol mixture (1: 9).Additional mixing PEG20000 and POLYOX303.With the fluidization granulator lysate of in mixture, spraying, granulate.Behind particle drying, hybrid lubricant, tabletting gets diameter 9.0mm, the tablet of a slice weight 300mg (hydrochloric バ Le ニ ジ ピ Application 15mg).

Embodiment 17

Hydrochloric acid ァ モ ス ラ ロ-Le 40 (mg)

プルロニッンクF68 40

POLYOX303 196

Lubricant 4

After hydrochloric acid ァ モ ス ラ ロ-Le, プ Le ロ ニ ッ Network F68, POLYOX303 and mix lubricant pulverizing, dry granulation.With the granule tabletting, getting diameter is 8.5mm, and a slice weight is the tablet of 280mg (hydrochloric ァ モ ス ラ ロ-Le 40mg).

Embodiment 18

Hydrochloric acid system ス ロ シ Application 0.2 (mg)

D-sorbitol 17.8

POLYOX WSR N-60K 180

Lubricant 2

Hydrochloric acid system ス ロ シ Application, D-sorbitol and PEO (POLYOX WSR N-60K) are carried out wet granulation, drying with ethanol.In dry product, add lubricant, mix, tabletting, getting diameter is that 8mm, a slice weight are the tablet of 200mg (hydrochloric system ス ロ シ Application 0.2mg).

Embodiment 19

Hydrochloric acid ィ Application デ ロ キ サ ジ Application 60 (mg)

White sugar 37

HPMC(90SH30000) 180

Lubricant 3

After hydrochloric acid ィ Application デ ロ キ サ ジ Application, white sugar, HPMC and mix lubricant, carry out dry granulation.With the granule tabletting, getting diameter is that 9mm, a slice weight are the tablet of 280mg (hydrochloric ィ Application デ ロ キ サ ジ Application 60mg).

Embodiment 20

Fumaric acid Off ォ Le モ テ ロ-Le 0.16 (mg)

Anhydrous maltose 47.84

Power-ボ Port-Le 940 100

Lubricant 2

With tabletting after fumaric acid Off ォ Le モ テ ロ-Le, anhydrous maltose, power-ボ Port-Le 940 and the mix lubricant, getting diameter is 7mm, a slice weight 150mg tablet of (containing fumaric acid Off ォ Le モ テ ロ-Le 0.16mg).

Embodiment 21

AAP 100(mg)

PEG6000 200

PEO(polyox WSR N-60K) 300

With acetaminophen (AAP), PEG6000 and PEO (POLYOX WSR N-60K mean molecule quantity 2,000,000), in mortar, mix, with 1 ton/pestle pressure tabletting, getting diameter is that 11mm, a slice weight are the 600mg tablet of (containing AAP 100mg) with hydraulic press.Comparative example 5

AAP 100(mg)

PEO(POLYOX WSR N-60K) 300

AAP and PEO (POLYOX WSR N-60K) are mixed in mortar, and with 1 ton/pestle pressure tabletting, getting diameter is that 9mm, a slice weight are the 400mg tablet of (containing AAP 100mg) with hydraulic press.

(1) dissolution test

Adopt Japanese Pharmacopoeia slaking test method the 2nd liquid as experimental liquid,, test with the 200rpm speed of agitator by Japanese pharmacopeia dissolution test the 2nd method (paddling process).Per hour sampling is with the AAP in the UV method mensuration solution.

(2) gel formation test

Adopt Japanese Pharmacopoeia slaking test method the 2nd liquid as experimental liquid,, test with the 25rpm speed of agitator by Japanese pharmacopeia dissolution test the 2nd method (paddling process).Take out tablet after 2 hours, measure the diameter (D obs) of not gelation part.Calculate gelation rate (G) by D obs.

(3) dog medicine-feeding test

The male beagle (n=6) that fasting is about 20 hours, comparative example 5 (AAP100mg) and embodiment 21 (AAP 100mg) is oral with water 30ml water.Press the certain hour blood sampling, with the drug level in high-pressure liquid phase/ultraviolet spectroscopy mensuration blood plasma.

Result of the test

In external dissolution test, comparative example 5 and embodiment 21 show roughly the same stripping situation, and the embodiment 21 that has added the hydrophilic base has bigger gelation rate than comparative example 5.These preparations give the Canis familiaris L. oral administration and the result, with comparative example 5 throw with the time relatively, embodiment 21 tablets throw with the time blood plasma Chinese medicine concentration pass lasting significantly.Embodiment 21 throw with the time maximum plasma Chinese medicine concentration (Cmax) with comparative example 5 tablets throw with the time roughly the same, and AUC, MRT increase.After 12 hours, still show high concentration with the blood level of embodiment 21 administrations.

Use preparation of the present invention, preparation absorbs moisture in digestive tract top stagnates an ancient unit of weight equal to 20 or 24 *taels of silver process, almost completely gelation, the dosage surface limit is divided a word with a hyphen at the end of a line to the digestive tract bottom by the etch limit, owing to further etch continues to discharge medicine, thereby, (add release time even in the few colon of moisture, also can reach about 6-18 hour on digestive tract top, for about 12-24 hour) good and persistent drug release, reach stable blood drug level.

Slow releasing agent before is owing to only discharge medicine on digestive tract top, only about 6 hours, then prolong blood level to some extent by the biological half life length difference of medicine itself later on release time at most.As for preparation of the present invention, because the prolongation of pharmaceutical release time itself also may reach the short medicament of biological half life that always becomes a difficult problem and surpasses 12 hours the blood drug level that continues.

Thereby preparation of the present invention can make drug effect continue and reduce administration number of times, and the urgency that suppresses blood drug level simultaneously brushes liter and alleviates side effect, thereby has the advantages such as blood drug level that keep certain.

The present invention is as putting down in writing among the above-mentioned embodiment, confirmation can prolong the lasting soak time such as any medicines such as neutral medicine acetaminophen, alkalescent medicine hydrochloric acid ニ power Le ジ ピ Application and acidic drug diclofenac sodiums, thereby is the high preparation technique of versatility that does not rely on the physical property of medicine.

Claims (9)

1. A hydrogel-type sustained-release solid oral preparation, comprising (1) at least one drug accounting for 85% by weight of the total preparation, (2) accounting for 5-80% by weight of the total preparation. an internally acting hydrophilic base, and (3) 10-95% by weight of a hydrogel-forming polymer in a formulation capable of substantially complete gelation during retention in the upper digestive tract, while Drugs are also released from the lower part of the digestive tract, including the colon. 2. The hydrogel type sustained-release solid oral preparation according to claim 1, wherein the hydrophilic base agent having the effect of making water penetrate into the preparation contains at least one of the base agents, and the base agent has a solubility The amount of water needed to dissolve 1g is less than 5ml. 3. The hydrogel type sustained-release solid oral preparation according to claim 2, wherein the hydrophilic base agent having the effect of making water penetrate into the inside of the preparation is at least one of the base agents, and the base agent has a solubility The amount of water needed to dissolve 1g is less than 4ml. 4. The hydrogel type sustained-release solid oral preparation according to claim 1, wherein the amount of the hydrophilic base having the effect of allowing water to penetrate inside the preparation is 5-60% by weight of the total preparation. 5. The hydrogel sustained-release solid oral preparation according to claim 1, wherein the content of the drug is 80% by weight or less of the total amount of the preparation. 6. The hydrogel-type sustained-release solid oral preparation according to claim 1, wherein the content of the hydrogel-forming polymer is 15-90% by weight of the total amount of the preparation. 7. The hydrogel-type sustained-release solid oral preparation according to claim 1, wherein said hydrogel-forming polymer is a polymer having an average molecular weight of not less than 2,000,000 or a 1% aqueous solution thereof as measured at 25°C Polymers with a viscosity not lower than 1000cps. 8. The hydrogel-type sustained-release solid oral preparation according to claim 1, wherein said hydrogel-forming polymer is polyethylene oxide. 9. The hydrogel-type sustained-release solid oral preparation according to claim 1, wherein the drug is nipiramine hydrochloride.

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